Rose plant named ‘Poulcs012’

ABSTRACT

A new garden rose plant of the floribunda class which has abundant, light yellow flowers and attractive foliage. This new and distinct variety has shown to be uniform and stable in the resulting generations from asexual propagation.

Botanical classification: Rosa hybrida.

Variety denomination: ‘Poulcs012’.

SUMMARY OF THE INVENTION

The present invention constitutes a new and distinct variety of garden rose plant which originated from a controlled crossing between the female seed parent, an unnamed seedling, and the male pollen parent ‘Poulsun’, U.S. Plant Pat. No. 9,716. The two parents were crossed during the summer of 1992 and the resulting seeds were planted in a controlled environment in Fredensborg, Denmark. The new variety named ‘Poulcs012’ originated as a single seedling from the stated cross.

The new variety may be distinguished from its unnamed female seed parent, by the difference in flower color. While the seed parent has creamy white flowers, ‘Poulcs012’ has medium yellow flowers.

The new variety may be distinguished from its male pollen parent, ‘Poulsun’ by the following combination of characteristics:

-   -   1. While the pollen parent ‘Poulsun’ has flower petals which are         Yellow Group 13A on the upper surface, ‘Poulcs012’ has flower         petals which are Yellow Group 4C.     -   2. While the pollen parent reaches a height of 12 inches (30         cm), ‘Poulcs012’ grows taller, to a height of 60 cm.

The objective of the hybridization of this rose variety was to create a new and distinct variety for garden use with unique qualities, such as:

-   -   1. Uniform and abundant light yellow flowers;     -   2. Vigorous, but compact growth when propagated both as a budded         rose and on its own roots;     -   3. Disease resistance;     -   4. Continuous flowering.

This combination of qualities is not present in previously available commercial cultivars of this type, known to the inventors, and distinguish ‘Poulcs012’ from all other varieties of which we are aware.

As part of their rose development program, L. Pernille Olesen and Mogens N. Olesen germinated the seeds from the aforementioned hybridization during winter of 1992 and conducted evaluations on the resulting seedlings in a controlled environment in Fredensborg, Denmark.

‘Poulcs012’ was selected in the spring 1993 by the inventors as a single plant from the progeny of the aforementioned hybridization.

Asexual reproduction of ‘Poulcs012’ by traditional budding and rooted cuttings was first done by L. Pernille and Mogens N. Olesen in their nursery in Fredensborg, Denmark in July, 1993. This initial and other subsequent asexual propagations conducted in controlled environments have demonstrated that the characteristics of ‘Poulcs012’ are true to type and are transmitted from one generation to the next.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying color illustration shows as true as is reasonably possible to obtain in color photographs of this type, the typical characteristics of the buds, flowers, leaves, and stems, of ‘Poulcs012’. Specifically illustrated in the first drawing:

FIG. 1.1; Open flower, stem showing cluster of open flowers, branching, and the attachment of leaves, buds, and peduncles;

FIG. 1.2; Flower bud closed, flower bud as sepals unfold, and partially open;

FIG. 1.3; Flower petals, detached.

Specifically illustrated in the second drawing:

FIG. 2.1; Sepals, receptacle, and peduncle;

FIG. 2.2; Juvenile leaf;

FIG. 2.3; Mature leaves;

FIG. 2.4; Bare stems exhibiting thorns.

DETAILED DESCRIPTION OF THE VARIETY

The following is a description of ‘Poulcs012’, as observed in its growth in a field nursery in Jackson County, Oreg. Observed plants are 3 years of age. Plants were grown on Rosa multiflora understock. Color references are made using The Royal Hortifultural Society (London, England) Colour Chart, 1995, except where common terms of color are used.

For a comparison, several physical characteristics of the rose variety ‘Pouljill’, U.S. Plant Pat. No. 12,522 are compared to ‘Poulcs012’ in Chart 1.

CHART 1 ‘Poulcs012’ ‘Pouljill’ Petalage 30 to 35 petals 35 to 40 petals Plant height 60 cm 100 cm at full maturity. Upon opening: Yellow Group 4C. Yellow Group 13B flower petals with marginal zone inner surface Yellow Group 11D. of inner petals.

FLOWER AND FLOWER BUD

Blooming habit: Continuous.

-   Flower bud:     -   -   Size.—Upon opening, 18 mm in length from base of receptacle             to end of bud. Diameter is 15 mm.         -   Bud form.—Broadly ovate to spherical.         -   Bud color.—As sepals unfold, petals are Yellow Group 2C with             intonations of Red Group 47A. At ¼ opening Petals are Yellow             Group 4D.         -   Sepals.—Upper Surface: Color: Yellow-Green Group 143C with             anthocyanic pigments of Greyed-Red Group 181B. Surface:             Moderately pubescent, in comparison to the species. Lower             Surface: Color: Yellow-Green Group 143C with anthocyanic             pigments of Greyed-Purple Group 184C. Texture: Smooth with             abundant and very fragrant stipitate glands. Sepal Shape:             Sepal apex is cirrhose. Base is flat at union with             receptacle. Sepal Margin: Margins have strong foliaceous             appendages on three of the five sepals. Size: 18 mm (l)×8 mm             (w).         -   Receptacle.—Surface Texture: Smooth and glabrous. Shape:             Funnel shaped. Size: 4 mm (h)×6 mm (w). Color: Yellow-Green             Group 144A. Anthocyanic pigments the color of Greyed-Orange             Group 167A observed.         -   Pedicel.—Surface: Heavy stipitate glands and fragrant.             Length: 20 to 25 mm average length. Diameter: 3 mm on             average. Color: Yellow-Green Group 144B. Weak anthocyanic             pigments the color of Greyed-Red Group 180B observed.             Strength: Strong.         -   Borne.—In clusters of 21 flowers, 7 buds per individual             flowering stem.         -   Peduncle.—Length: 60 to 100 mm. Diameter: Normally 4 mm.             Color: Yellow-Green Group 144B. Texture: Smooth. -   Flower bloom:     -   -   Fragrance.—Moderate wild rose scent.         -   Duration.—The blooms have a duration on the plant of             approximately 10 to 14 days. After flowers completely             mature, petals fall cleanly away from plant.         -   Size.—Flower diameter is 53 mm when open. Flower depth is 27             mm on average.         -   Form.—Calathiform. Shape of flower when viewed from the             side: Upon opening, upper part: Flat. Upon opening, lower             part: Flat. Open flower, upper part: Flat. Open flower,             lower part: Concave. -   Petalage: Average range is 30 to 35 petals under normal conditions     with 10 petaloids. -   Color: -   Upon opening, petals:     -   -   Outermost petals.—Outer side: Yellow Group 4D. Innder Side:             Yellow Group 4C.         -   Innermost petals.—Outer side: Yellow Group 4D. Inner Side:             Yellow Group 4C. -   After opening, petals:     -   -   Outermost petals.—Outer side: Yellow Group 4D. Inner Side:             Yellow Group 4C.         -   Innermost petals.—Outer side: Yellow Group 4D. Inner Side:             Yellow Group 4C. -   General tonality: On open flower Yellow Group 4D. No change in the     general tonality at the end of the tenth day. -   Petals:     -   -   Petal reflex.—Somewhat reflexed.         -   Margin.—Entire and uniform. Weak to medium undulations of             margin observed.         -   Shape.—Apex: Round. Base: Acute. Petals are generally             broadly elliptic.         -   Size.—35 mm (l)×32 mm (w).         -   Texture.—Smooth.         -   Thickness.—Average.         -   Arrangement.—Not formal. -   Petaloids:     -   -   Quantity.—8 to 12.         -   Color.—Upper Surface: Yellow Group 4C. Lower Surface: Yellow             Group 4D.         -   Size.—30 mm (l)×28 mm (w).         -   Shape.—Elliptical. Base and apex are acute. -   Reproductive organs:     -   -   Pistils.—Length: 5 mm long. Quantity: 59 (approximately).         -   Pollen.—None observed.         -   Anthers.—Size: 1 to 2 mm in length. Color: Greyed-Orange             Group 163B. Quantity: 99 (approximately).         -   Filaments.—Color: Yellow Group 9A. Length: 4 mm.         -   Stigmas.—Superior relative to the length of filaments and to             the height of the anthers. Color: Greyed-Yellow Group 162A.         -   Styles.—Color: Yellow-Green Group 150D. Other Intonations:             Red-Purple Group 57A.         -   Hips.—None Observed in the field nursery in Jackson County             Oreg.

PLANT

-   Plant growth: Moderate, upright to bushy. When grown as a budded     field grown plant on Rosa multiflora understock, the average height     of the plant is 60 cm and the average width is 60 cm. -   Stems:     -   -   Color.—Young wood: Yellow-Green Group 144B. Older wood:             Yellow-Green Group 144B.         -   Surface texture.—Young wood: Smooth. Older wood: Smooth. -   Thorns:     -   -   Incidence.—4 thorns per 10 cm of stem.         -   Size.—9 mm.         -   Color.—Greyed-Orange Group 177B.         -   Shape.—Deeply concave. -   Plant foliage: Normal number of leaflets on normal leaves in middle     of the stem: 5 leaflets.     -   -   Compound leaf size.—150 mm in length by 120 mm wide.         -   Quantity.—On average, there are 3 leaves per 10 cm of stem.         -   Color.—Mature Foliage: Upper surface is: Green Group 137A to             Yellow-Green Group 144A. Lower surface is: Yellow-Green             Group 147C. Juvenile foliage: Upper surface is: Yellow-Green             Group 144A. Lower surface is: Yellow-Green Group 144B. -   Plant leaves and leaflets:     -   -   Stipules.—Size: 20 mm in length. Shape: Linear with outward             extending apices. The apex is acute. Base is flat at the             union with the petiole. Quantity: 2 per compound leaf.             Margins: Finely serrated with abundant stipitate glands.             Color: Yellow-Green Group 144A.         -   Petiole.—Length: 25 mm. Above: Color: Yellow-Green Group             144B. Underneath: Observations: Thorns observed. Color:             Yellow-Green Group 144A.         -   Rachis.—Length: 53 mm. Above: Color: Yellow-Green Group             144B. Underneath: Observations: Thorns observed. Color:             Yellow-Green Group 144A.         -   Leaflet.—Edge: Serrated. Size: 45 to 68 mm (l)×25 to 42 mm             (w). Shape: Ovate. Apex is cuspidate. Base is round.             Texture: Smooth. Thickness: Thick. Arrangement: Odd pinnate.             Venation: Reticulate. Glossiness: Glossy. -   Disease resistance: Above average resistance to mildew, rust, black     spot, and Botrytis under normal growing conditions in Jackson     County, Oreg. -   Cold hardiness: The variety ‘Poulcs012’ has been found to be cold     tolerant to USDA Cold Hardiness Zone 6. 

1. A new and distinct variety of rose plant of the floribunda rose class named ‘Poulcs012’, substantially as herein illustrated and described as a distinct and novel rose variety due to its abundant light yellow flowers, disease resistance, and extended period of bloom. 